JP3966892B2 - Shredder - Google Patents

Description

  The present invention relates to a shredding machine suitable for shredding, for example, by-products (such as sprues and runners) generated during molding of thermoplastic synthetic resin products into reusable fine pieces.

  Shredders that shred by-products (sprue, runners, etc.) generated during the molding of thermoplastic synthetic resin products into reusable fine pieces have been commercialized.

  An object of the present invention is to provide a shredding machine that is easy to perform maintenance and has high rigidity (high strength) while reducing the number of parts.

  A shredder according to a first aspect of the present invention is a pair of fixed side walls arranged at a predetermined interval, a rotary shaft that is rotatably passed to both fixed side walls, and has a rotary blade, in parallel with the rotary shaft, A pair of support shafts secured to both lower ends of both fixed side walls, a swing side wall provided on each of the support shafts so as to be swingable and openable, and provided inside one of the swing side walls, A fixed blade that shreds the workpiece by cooperation with the rotary blade, and a scraper provided inside the other swing side wall, and the rotary blade is positioned between the fixed blade and the scraper. The rotary blade has an arm-shaped rough cutting rotary blade and a fine cutting rotary blade having serrated chopping teeth on the outer periphery, and is positioned below the fixed blade and the scraper. A covering member surrounding the movement locus space of the rotary blade for rough cutting is provided, and the covering member is A first side member provided on one of the oscillating side walls, a second side member provided on the other oscillating side wall, the first side member and the second side member, and the first side member And it is a different body from the 2nd side member, Comprising: It has the intermediate member made detachable.

  The shredder according to a second aspect of the present invention is the shredding machine according to the first aspect, wherein a left spiral portion is formed on the inner side of one end of the rotary shaft, a right spiral portion is formed on the inner side of the other end of the rotary shaft, and the left The spiral portion and the right spiral portion are configured to face the inner surface of the hole into which the rotation shaft of the fixed side wall is fitted.

  The shredder according to a third aspect of the present invention is characterized in that, in the first aspect, a square hole is formed in a side wall of the rough cutting rotary blade.

  The shredder according to a fourth aspect of the present invention is the shredding machine according to the first aspect, wherein the fixed blade and the scraper are each fixed by bolts inside the one swinging side wall and inside the other swinging side wall. Is characterized by an upwardly convex curved surface.

  The shredding machine according to a fifth aspect of the present invention is the shredding machine according to the first aspect, wherein the locking piece has a U-shaped planar shape and has tapered surfaces that are opposed to each other in plan view and open toward the tip side. A formed through hole, an inclined surface provided in each of the fixed side wall and the swing side wall and opposed to the tapered surface, and a screw hole provided in the fixed side wall and screwed into a screw passing through the through hole. The oscillating side wall is fixed to the fixed side wall by tightening the screw and pressing the tapered surface against the inclined surface.

  In the first invention, since the front and rear swing side walls are opened, the maintenance is facilitated. In addition, since the two support shafts also serve as a connecting material for connecting the pivot shaft of the swinging side wall and the left and right fixed side walls, the number of parts can be reduced and the cost can be reduced. Furthermore, since the intermediate member of the cover member is detachable, maintenance is facilitated.

  In the second invention, a left spiral portion is formed on the inner side of one end of the rotary shaft, a right spiral portion is formed on the inner side of the other end of the rotary shaft, and the left spiral portion and the right spiral portion are fixed. Since the rotation axis of the side wall is opposed to the inner surface of the hole into which the rotation shaft is fitted, the object to be processed (including fine fragments) that enters between the left and right spiral portions and the inner surface of the hole as the rotation shaft rotates. ) Can be fed into the casing so that the object to be processed does not enter the bearing.

  In the third aspect of the present invention, since the square hole is formed in the side wall of the rough cutting rotary blade, the rough cutting rotary blade can be manually rotated by fitting the rotary tool into the square hole.

  In the fourth invention, each of the fixed blade and the scraper is fixed with a bolt inside the one oscillating side wall and inside the other oscillating side wall, and the head of the bolt has a convex curved surface upward. By being provided, it is possible to prevent the object to be processed from fitting into the head of the bolt.

  In the fifth aspect of the invention, the swinging side wall can be locked to the fixed side wall by tightening the screw and pressing the taper surface against the inclined surface after making the tapered surface face the inclined surface. The rigidity of can be increased.

  Embodiments of the present invention will be described below. In this description, “front” refers to the front side of FIG. 1, “back” refers to the back side, “left” refers to the left side of FIG. 1, and “right” refers to the right side of FIG.

As shown in FIGS. 1 and 2, the casing 3 attached to the horizontal substrate 2 of the shredder 1 has an inlet 4 at the upper part and an outlet 5 at the lower part. An opening 6 is formed in the substrate 2 so as to face the outlet 5. A receiving box (not shown) for receiving the fine pieces is disposed below the opening 6 of the substrate 2. The casing 3 includes left and right fixed side walls 9 arranged at a predetermined interval in the left and right direction, front and rear support shafts 10 secured to the lower portions of the front and rear portions of the fixed side walls 9, and swinging back and forth on the support shafts 10. It has front and rear swing side walls 11 that can be freely opened and closed, and a connecting member 12 that is secured to the upper front part of the left and right fixed side walls 9. The support shaft 10 has a function as a connecting material for connecting the pivot shaft that supports the swing side wall 11 so as to swing freely and the fixed side wall 9. It should be noted that the front swing side wall 11 hits the connecting member 12 so as not to swing back beyond the position shown in FIG. 5, and the rear swing side wall 11 hits a stopper (not shown) (provided on the fixed side wall 9). It is designed not to swing forward beyond the position of FIG.

  As shown in FIG. 4, concentric through-holes 15 are formed in the fixed side wall 9 with the axial center directed in the left-right direction, bearings 16 are attached to the through-holes 15, and the shaft centers are aligned in the left-right direction. A rotating shaft 17 is provided to be rotatable. The rotating shaft 17 is rotated in the direction of arrow A by a motor 18 (see FIG. 1). A left spiral portion 19 is formed on the inner side of the left end portion of the rotating shaft 17, a right spiral portion 20 is formed on the inner side portion of the right end portion, and the left and right spiral portions 19, 20 are formed on the inner surface of the through hole 15. It is made to oppose. With such a configuration, as the rotating shaft 17 rotates in the direction of the arrow A, the workpieces (including fine fragments) that have entered between the left and right spiral portions 19 and 20 and the inner surface of the through hole 15 can be obtained. , And sent out into the casing 3.

  At least one, in the present embodiment, two arm-shaped rough cutting rotary blades 23 are spaced apart from each other by a predetermined distance in the left-right direction, and are also spaced from the fixed side wall 9. And it is locked in. In addition, at least one, in the present embodiment, three fine cutting rotary blades 24 are fixed to the rotary shaft 17. The rough cutting rotary blade 23 and the fine cutting rotary blade 24 adjacent to each other are brought into close contact with each other, and the leftmost and rightmost fine cutting rotary blades 24 do not hinder their rotation on the fixed side wall 9. Thus, they are opposed to each other with a slight gap. The rough cutting rotary blade 23 is formed with a square hole 25 for a rotary tool. With such a configuration, a rotary tool can be fitted into the square hole 25 and the rough cutting rotary blade 23 can be manually rotated. In the fine cutting rotary blade 24, annular grooves 27 are formed at predetermined intervals in the left-right direction, and sawtooth-shaped chopping teeth 29 are formed on the protrusions 28 between the annular grooves 27. (See FIG. 7).

  A fixed blade 32 for chopping an object to be processed in cooperation with the coarse cutting rotary blade 23 and the fine cutting rotary blade 24 is inclined downwardly and rearwardly inside the front swing side wall 11. Attached. The fixed blade 32 is a front member 32a that is long in the left-right direction and is located on the front side of the movement locus of the tip of the rough cutting rotary blade 23, and the movement of the rough cutting rotary blade 23 that is separate from the front member 32a. And a rear member 32b (see FIG. 3) divided at the position of the locus.

  As shown in FIG. 7, the front member 32a is fixed to the front swinging side wall 11 by a required bolt 33, and the rear edge facing the movement path of the rough cutting rotary blade 23 is a blade (rough cutting rotation). It is designed to function as a blade that shreds the workpiece by cooperation with the blade 23.

  As shown in FIG. 7, the rear member 32b is fixed to the front swinging side wall 11 by a required bolt 34 and nut 35, and the side edge facing the movement locus of the rough cutting rotary blade 23 is a blade (rough cutting). The blade functions as a blade for chopping an object to be processed in cooperation with the rotary blade 23 for use. Further, the rear edge portion of the rear member 32b is made uneven so as to mesh with the fine cutting rotary blade 24 (see FIG. 3), and this concave and convex portion becomes an object to be processed in cooperation with the blade (the fine cutting rotary blade 24). The blade is shredded. The head of the bolt 34 has an upwardly convex curved surface without a recess into which the workpiece is fitted. Further, the upper part of the shaft part of the bolt 34 (the part below the head part) is a square shaft part (shaft having a rectangular cross section), and this square shaft part fits into a square hole formed in the rear member 32b, The bolt 34 is prevented from rotating relative to the rear member 32b.

  Three scrapers 38 for scraping off the object to be processed by cooperation with the thin cutting rotary blade 24 are attached to the inside of the rear swing wall 11 so as to incline downward toward the front. The scraper 38 is disposed so as not to collide with or interfere with the rough cutting rotary blade 23. As shown in FIG. 7, the scraper 38 is fixed to the rear swing side wall 11 by a required bolt 34 and nut 35, and the front edge portion of the scraper 38 is uneven so as to engage with the rotary blade 24 for fine cutting. (See FIG. 3), the uneven portion is a scraping portion (a portion that scrapes off the workpiece by cooperation with the fine cutting rotary blade 24).

  With the configuration as described above, the rough cutting rotary blade 23 and the fine cutting rotary blade 24 are positioned between the fixed blade 32 and the scraper 38.

  As shown in FIGS. 5 and 6, a covering member 40 is provided so as to be located below the fixed blade 32 and the scraper 38 so as to surround the movement locus space of the rough cutting rotary blade 23. The covering member 40 connects the front member 40a provided on the front swing side wall 11, the rear member 40c provided on the rear swing side wall 11, and the front member 40a and the rear member 40c. And a separate intermediate member 40b. In FIG. 5, the boundary between the front member 40a and the intermediate member 40b is indicated by “L”, and the boundary between the intermediate member 40b and the rear member 40c is indicated by “M”.

  The intermediate member 40b is detachably attached to the casing 3 by the following means. The front and rear swing side walls 11 are provided with support members 42 that support the intermediate member 40b of the cover member 40 when they are open. In addition, the front and rear swing side walls 11 are provided with holders 43 that prevent the intermediate member 40b from moving in the left-right direction. Then, when the front and rear swing side walls 11 are closed (when they are in an upright state), the front and rear support members 42, the front side member 40a, and the intermediate member 40b prevent the intermediate member 40b from moving in the front-rear direction. The holder 43 does not move in the left-right direction. With such a configuration, the intermediate member 40b can be easily taken out from the casing 3 by opening the front and rear swing side walls 11, so that the intermediate member 40b can be easily cleaned.

  The front and rear swing side walls 11 are locked by a lock device 46 shown in FIG. 8 at the position shown in FIG. The locking device 46 includes a planar U-shaped locking piece 48 having a tapered surface 47 that opens toward the distal end when viewed from above, and a fixed side wall through a through hole 49 formed in the locking piece 48. A screw 51 with a handle that is screwed into a screw hole 50 formed in 9, an inclined surface 52 formed on the fixed side wall 9 facing the tapered surface 47, and an inclined surface 52 formed on the swing side wall 11. Have. With such a configuration, the swinging side wall 11 can be locked to the fixed side wall 9 by causing the tapered surface 47 to face the inclined surface 52 and then tightening the screw 51 to press the tapered surface 47 against the inclined surface 52. it can.

  A hopper 56 is provided on the right fixed side wall 9 through a hinge 55 so as to be swingable. The hopper 56 is fixed to the left fixed side wall 9 by a known locking device (not shown) in the state shown in FIG.

  As shown in FIGS. 1 and 9, an interlock device 57 is provided on the hopper 56 and the swing side wall 11. The interlock device 57 includes a reflective photoelectric switch 58 provided on the upper portion of the swing side wall 11 and a detected piece 59 provided on the hopper 56 that is detected by the photoelectric switch 58 in the state of FIG. Have. Unless the photoelectric switch 58 detects the detected piece 59, that is, unless the swing side wall 11 is closed (becomes upright) and the hopper 56 is not placed on the casing 3, the shredder 1 Even if the main switch is turned on, the motor 18 is not operated. A receiving piece 60 is provided at the lower portion of the hopper 56 to prevent inadvertent opening of the swing side wall 11.

  The operation of the shredder 1 is the same as the conventional one.

A description will be given below of modifications and the like.
(1) The rough cutting rotary blade 23 and the fine cutting rotary blade 24 are rotary blades according to claim 1. The structures of the rough cutting rotary blade 23 and the fine cutting rotary blade 24 are arbitrary.
(2) The interlock device 57 may not be provided.

It is a principal part front view which shows embodiment of this invention. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is sectional drawing which shows only the principal part of the middle omission along the IV-IV line of FIG. It is the VV sectional view taken on the line of FIG. It is sectional drawing which deleted the fixed blade in alignment with the VI-VI line of FIG. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. It is the IX-IX sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shredder 3 Casing 9 Fixed side wall 10 Support shaft 11 Oscillating side wall 12 Connecting material 15 Through-hole (hole)
17 Rotating shaft 19 Left spiral portion 20 Right spiral portion 23 Coarse cutting rotary blade 24 Fine cutting rotary blade 25 Square hole 32 Fixed blade 34 Bolt 38 Scraper 47 Tapered surface 48 Lock piece 49 Through hole 50 Screw hole 52 Inclined surface

Claims (5)

A pair of fixed side walls arranged at a predetermined interval;
A rotary shaft that is rotatably passed to both fixed side walls and has a rotary blade;
A pair of support shafts held parallel to the lower ends of both fixed side walls in parallel with the rotation shaft;
A swing side wall provided on each of the support shafts so as to be swingable and openable;
A fixed blade provided inside one of the oscillating side walls and chopping the workpiece by cooperation with the rotary blade;
A scraper provided inside the other swing side wall,
The rotary blade is positioned between the fixed blade and the scraper,
The rotary blade is
It has an arm-like rough cutting rotary blade and a fine cutting rotary blade having serrated fine teeth on the outer periphery,
A covering member is provided so as to be positioned below the fixed blade and the scraper and encloses the movement locus space of the rough cutting rotary blade;
The covering member is
A first side member provided on the one swing side wall;
A second side member provided on the other swing side wall;
A shredder that connects the first side member and the second side member, and has an intermediate member that is separate from the first side member and the second side member and is detachable. . A left spiral portion is formed on the inner side of one end of the rotation shaft,
A right spiral is formed on the inner side of the other end of the rotating shaft;
The shredder according to claim 1, wherein the left spiral portion and the right spiral portion are opposed to an inner surface of a hole into which a rotation shaft of the fixed side wall is fitted. On the side wall of the rough cutting rotary blade,
The shredder according to claim 1, wherein a square hole is formed. Each of the fixed blade and the scraper is
It is fixed with bolts inside the one swinging side wall and inside the other swinging side wall,
The head of the bolt is
2. The shredder according to claim 1, wherein the shredder has an upwardly convex curved surface. A locking piece having a U-shaped planar shape and having a tapered surface that is opposed to each other in plan view and opens toward the tip side;
A through hole formed in the lock piece;
An inclined surface provided on each of the fixed side wall and the swing side wall and facing the tapered surface;
A screw hole provided in the fixed side wall and screwed into a screw passing through the through hole;
2. The shredding machine according to claim 1, wherein the oscillating side wall is fixed to the fixed side wall by tightening the screw and pressing the tapered surface against the inclined surface.

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